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復合活化處理鎳鈦合金及磷灰石層的仿生沉積
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TB43

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江蘇省自然科學基金項目（BK2003062）資助


Biomimetic Deposition of Apatite Coating on NiTi Shape Memory Alloy after a Composite Bioactive Treatment
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    摘要:

    利用H2O2和NaOH溶液對近等原子比NiTi記憶合金（SMA）進行復合活化處理,并采用XRD,SEM,XPS,FTIR等研究了活化處理后NiTi SMA的表面結構及其在模擬體液（SBF）中磷灰石涂層的仿生沉積過程.結果表明：復合活化處理后NiTi SMA表面為貧Ni、富含Ti-OH的蠕蟲狀活性層,由結晶度較低的TiO2,鈦酸納（Na2TiO3）及少量的Ni2O3組成,在SBF中表面活性層誘導磷灰石形核及生長,短期內在鎳鈦基體表面獲得了理想的磷灰石層.

    Abstract:

    The surface structure was characterized by XRD, SEM, XPS and FTIR for the NiTi shape memory alloy (SMA) with a nearly-equiatomic ratio after composite bioactive treatment in H2O2 and subsequent NaOH solutions. The biomimetic deposition process of apatite coatings on the pretreated NiTi SMA was studied in the simulated body fluid (SBF). The experimental results indicate that a wormlike bioactive layer with many Ti-OH groups and a trait of Ni2O3 is formed on the NiTi substrate after the composite bioactive treatment, which was mainly composed of the poorly-crystallized Na2TiO3 and TiO2 and relatively poor in Ni. The bioactive layer can induce the apatite nucleation and growth in SBF and obtain an ideal apatite coating on NiTi substrate in a short term.

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周俊 儲成林 鐘志源.復合活化處理鎳鈦合金及磷灰石層的仿生沉積[J].稀有金屬材料與工程,2006,35(6):994~997.[Zhou Jun, Chu Chenglin, Zhong Zhiyuan. Biomimetic Deposition of Apatite Coating on NiTi Shape Memory Alloy after a Composite Bioactive Treatment[J]. Rare Metal Materials and Engineering,2006,35(6):994~997.]
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  • 收稿日期:2005-06-23
  • 最后修改日期:2005-06-23
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